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The Design Of The Traffic Trunk Line Control System Based On The Control Of Variable Phase To The Single Crossing

Posted on:2008-04-08Degree:MasterType:Thesis
Country:ChinaCandidate:Z F LiuFull Text:PDF
GTID:2178360242479464Subject:Control Engineering
Abstract/Summary:PDF Full Text Request
As the key part of Intelligent Transportation System,City Traffic Control System has a great influence on the quality of social life.The key to heighten the quality of city traffic is the improvement of vehicles's driving speed on the trunk road,which depends on the decrease of the average delay of vehicles drive through the intersection where thrunk roads influx.This thesis select the video image-detection sensor which is of many advantages among the varieties of sensors of traffic detection to pick out the traffic parameter.Besides describing the working principle of the video image-detection sensor,two detecting algorithms are presented and the arithmetic of detecting the traffic parameter are illuminated respectively.Owing to the strong uncertainty of traffic flow and the terrible complexity of traffic structure, it is difficultfor the traffic system to build up its precise model and control with the mothod of model-solving,when design the signal lamp controller of the intersection and the signal lamp controller of the trunk line,we use the fuzzy logic control based on the fuzzy logic theory.we research the signal lamp controller of the intersection to replacing the signal lamp controller of the trunk line using equivalence transition. To the signal lamp controller of the intersection,we use the variable scheme controller to replace the fixed scheme controller.This thesis select the six crossings of the ShiFu Road of Xiamen city as the control object, using the data detecting by video image-detection sensor and fuzzy logic controller, to control the signal lamp of the trunk line.And to single crossing, we use the method of the variable scheme controller,avoiding the synchronization of all the crossings of the trunk line.At one time,we use the difference phase of two close crossings to decrease the times of the cars stopping.The actual control result indicate that the fuzzy logic controller decrease the average delay of the vehicle's passing through cross obviously,and the fuzzy logic controller is of better performance compared with the fixed-time-scheme while the trafic flow and the proportion of two phases vary in a large scale:enhancing the rate of utilization of trunk roads and utilizing the roads' time-space potential better.The analysis to the control result indicate that the road construction and the improvement of control scheme are the two factors supplemental each other to heighten the quality of city traffic.
Keywords/Search Tags:Video Image-detect, Variable Phase, Dynamic Phase Dispersion, Trunk Line Control
PDF Full Text Request
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